[R] time plotting problem

[Gabor Grothendieck]

In your examples the first line of your data refers to the
year 2009 and Oct 1st is repeated.  Is that really what
you meant?

I can't tell what your problem is from your description
other than the data problems cited but there are lots of
examples of plotting with zoo in the following which may
help you:
vignette("zoo")
vignette("zoo-quickref")
?plot.zoo
?xyplot.zoo

Note that zoo series must be time series, i.e. they must
have unique times.

On Nov 12, 2007 1:47 PM, John Kane <jrkrideau at yahoo.ca> wrote:
> I am completely misunderstanding how to handle dates.
> I want to plot a couple of data series against some
> dates.  Simple example 1 below works fine.
> Unfortunately I have multiple observations per day (no
> time breakdowns) and observations across years.
> (example 2 very simplistic version )
>
> Can anyone suggest a quick fix or point me to
> something to read?  I thought that zoo might do it but
> I seem to be missing something there too.
>
> Any suggestions gratefully recieved.
>
>
> Example 1 consecutive dates same year.
> =================================================
> x <- "days
> 9/26/09
> 9/27/06
> 9/28/06
> 9/29/06
> 9/29/06
> 9/29/06
> 10/1/06
> 10/1/06
> 10/2/06
> 10/3/06"
>
> mydata <- read.table(textConnection(x), header=TRUE,
> as.is=TRUE); mydata
>
> mydates <- as.Date(mydata[,1], "%m/%d/%y"); mydates
> mynums <- rnorm(10)
> plot(mydates, mynums)
> ================================================
> Example 2 (things go blooy!)
> non-consecutive dates different years.
>
> =================================================
> x <- "days
> 9/26/09
> 9/27/06
> 9/28/06
> 9/29/06
> 9/29/06
> 9/29/06
> 10/1/07  # <- year changes
> 10/1/07
> 10/2/07
> 10/3/07"
>
> mydata <- read.table(textConnection(x), header=TRUE,
> as.is=TRUE); mydata
>
> mydates <- as.Date(mydata[,1], "%m/%d/%y"); mydates
> mynums <- rnorm(10)
> plot(mydates, mynums)
>
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